Exterior angles add up to 360 degrees
Interior angles add up to 2340 degrees
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The interior angles of a 15 sided polygon add up to 2340 degrees and if it is a regular polygon then each interior angle is 156 degrees.
The sum of the interior angles of a 15-gon add up to 2340 degrees
24 degrees
Quindecagon or pentadecagona 15 sided pollygon is called a Pentadecagon, it has interior angles of 156 degrees each
The name of a 15 sided polygon is Pentadecagon.